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white' blood' cell"




any of various nearly colorless cells of the immune system that circulate mainly in the blood and lymph and participate in reactions to invading microorganisms or foreign particles, comprising the B cells, T cells, macrophages, monocytes, and granulocytes. Also called leukocyte, white' blood' cor"puscle, white corpuscle, white' cell".

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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